| 摘要 |
<p>The invention relates to a method for producing ominus;chloromethyl benzenecarbonyl chlorides of formula (I), wherein R1minus;R4 can be the same or different and stand for hydrogen, C1minus;C4minus;alkyl, halogen or trifluoromethyl, by converting benzocondensed lactones of formula (II), wherein R1minus;R4 have the aforementioned meaning, with gaseous or liquid phosgene and the dimers or trimers thereof. The inventive method is characterised in that the conversion is carried out in the presence of catalytical amounts of a Lewis acid and catalytical amounts of a phosgenation catalyst.</p> |
